Elsevier, I.(2011).The American Journal of Orthodontics and Dentofacial Orthopedics Volume 140 No.6 Desember 2011 (Volume 140 No.6 Desember 2011).New York. USA:Elsevier Inc.
Gaya MLA
Elsevier, I..The American Journal of Orthodontics and Dentofacial Orthopedics Volume 140 No.6 Desember 2011.Volume 140 No.6 Desember 2011New York. USA:Elsevier Inc,2011.Jurnal Internasional.